Hi Viveca,
You can read more about the differences between a latex polyfoam hybrid and an all latex mattress in post #2 here but a latex/polyfoam hybrid would certainly make sense for those that are in a lower budget range and can’t afford an all latex mattress.
In most cases and for most people that are not in heavier weight ranges I would certainly agree.
There are too many unknowns, variables, and personal preferences involved for anyone to make specific suggestions about the design of a mattress that may be best for someone else in terms of PPP based on specs (either yours or a mattress) or “theory at a distance” (see mattress firmness/comfort levels in post #2 here). Either your own personal testing and experience or a more detailed conversation with a knowledgeable and experienced online retailer or manufacturer (when you can’t test a specific mattress in person) are the most reliable way to choose the firmness level and design that you believe would work best for you. They will know more about their mattresses and which of the options they have available would have the best chance of success than anyone else.
There are a number of reasons for using a polyfoam quilting layer over latex. One of them is usually for some additional softness/plushness but this can also vary depending on the quilting pattern and the foam used because it can also be used to create a firmer sleeping surface. Another is that latex is a very resilient material and there are many people that prefer a less resilient and more “relaxed” sleeping surface vs sleeping directly on the latex. There are other reasons as well and there is more about the pros and cons of different types of quilting layers and materials in post #12 here and the posts it links to.
Outside of the link to the list of members in the tutorial post that include most of the better online latex and latex hybrid options that I’m aware of … posts #3 and #4 here also include several lower budget options for latex or latex hybrids that may be helpful or that you can use as a reference point for the “value” of any local purchase based on the parts of your personal value equation that are most important to you. The choice between online and a local purchase and the risks involved in either one is really a matter of personal preference. There is more about the pros and cons of an online vs a local purchase in this topic and some of the links in reply #4 of the topic.
The better local options and possibilities I’m aware of in the Port Charlotte, Fort Myers, Cape Coral, Naples, FL area are listed in post #2 here.
Phoenix